Hydraulic Bolt Tensioning

• Direct tension method

• Light-weight

• Faster

• Safer

• Adaptable

• Consistent gasket compression

• Eliminates spotface damage

•  "K" factor becomes redundant

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Hydraulic Bolt Tensioning tools provide a quick and easy method for tightening large diameter bolts to high and accurate pre-loads.  Unlike conventional methods it does not require any forceful turning of the nut or bolt.  With conventional torque-tightening methods, overcoming thread friction and friction between the nut and the washer requires up over 80% of the torque energy applied to the nut or bolt, leaving less than 20% of the energy to produce useful tension in the shank of the bolt.  Variations in this friction loss, from bolt to bolt often causes non-uniform tension in bolts that have been tightened to the same torque setting. Hydraulic Bolt Tensioning provides an effective means of overcoming such non-uniformity in bolt loads.

Bolt tensioning tools can be ganged together to enable multiple bolts to be rapidly and simultaneously tightened to the same high and accurate pre-load.  This is particularly useful when assembling critical gasket-sealed joints.  The high load developed by multiple bolt tensioning tools is evenly distributed around the joint causing the gasket to flow into the surface irregularities of the flange thus giving a much better seal.